Getting ID from asp.net runat server in jQuery

Question

I\'m trying make some stuff in jQuery using ASP.NET. But the ID from runat=\"server\" is not the same as the id used in HTML.

I used to use this to get

Answer 1

In WebForm / HTML Page....

In Jquery

var UserName = $("[id*=txtUserName]").val();
alert(UserName);

100% Sure its Working for me....